Buggy code:
@ Authors ( "Nikolche<seq2seq4repair_space>Mihajlovski" ) @ Since ( "2.0.0" ) public class Cls { private static Pattern JRE_CLASS_PATTERN = Pattern . compile ( "^(java|javax|javafx|com\\.sun|sun|com\\.oracle|oracle|jdk|org\\.omg|org\\.w3c).*" ) ; private static final Map < Class < ? > , Class < ? > > PRIMITIVE_WRAPPERS = U . map ( boolean . class , Boolean . class , byte . class , Byte . class , char . class , Character . class , double . class , Double . class , float . class , Float . class , int . class , Integer . class , long . class , Long . class , short . class , Short . class , void . class , Void . class ) ; private static final Map < String , TypeKind > KINDS = Cls . initKinds ( ) ; private Cls ( ) { } protected static Map < String , TypeKind > initKinds ( ) { } public static TypeKind kindOf ( Class < ? > type ) { } public static TypeKind kindOf ( Object value ) { } public static void setFieldValue ( Object instance , String fieldName , Object value ) { } public static void setFieldValue ( Field field , Object instance , Object value ) { } @ SuppressWarnings ( "unchecked" ) public static < T > T getFieldValue ( Object instance , String fieldName , T defaultValue ) { } public static Object getFieldValue ( Object instance , String fieldName ) { } public static Object getFieldValue ( Field field , Object instance ) { } public static List < Annotation > getAnnotations ( Class < ? > clazz ) { } public static List < Field > getFields ( Class < ? > clazz ) { } public static List < Field > getFieldsAnnotated ( Class < ? > clazz , Class < ? extends Annotation > annotation ) { } public static List < Method > getMethodsAnnotated ( Class < ? > clazz , Class < ? extends Annotation > annotation ) { } public static Method getMethod ( Class < ? > clazz , String name , Class < ? > ... parameterTypes ) { } public static Method findMethod ( Class < ? > clazz , String name , Class < ? > ... parameterTypes ) { } public static Field getField ( Class < ? > clazz , String name ) { } public static Field findField ( Class < ? > clazz , String name ) { } @ SuppressWarnings ( "unchecked" ) public static < T > T invokeStatic ( Method m , Object ... args ) { } @ SuppressWarnings ( "unchecked" ) public static < T > T invoke ( Method m , Object target , Object ... args ) { } public static Class < ? > [ ] getImplementedInterfaces ( Class < ? > clazz ) { } public static boolean annotatedMethod ( Object instance , String methodName , Class < Annotation > annotation ) { } public static < T > Constructor < T > getConstructor ( Class < T > clazz , Class < ? > ... paramTypes ) { } @ SuppressWarnings ( "unchecked" ) public static < T > T newInstance ( Class < T > clazz , Map < String , Object > properties ) { } private static Object [ ] getAssignableArgs ( Class < ? > [ ] types , Collection < ? > properties ) { } @ SuppressWarnings ( "unchecked" ) public static < T > T getUniqueInstanceOf ( Class < T > type , Collection < ? > values ) { } public static Object [ ] instantiateAll ( Class < ? > ... classes ) { } public static Object [ ] instantiateAll ( Collection < Class < ? > > classes ) { } @ SuppressWarnings ( "unchecked" ) public static < T > T createProxy ( InvocationHandler handler , Class < ? > ... interfaces ) { <START_BUG> return ( ( T ) ( Proxy . newProxyInstance ( Cls . classLoader ( ) , interfaces , handler ) ) ) ; <END_BUG> } public static ClassLoader classLoader ( ) { } public static < T > T implement ( final Object target , final InvocationHandler handler , Class < ? > ... interfaces ) { } public static < T > T implement ( InvocationHandler handler , Class < ? > ... classes ) { } public static < T > T implementInterfaces ( Object target , InvocationHandler handler ) { } public static < T > T tracer ( Object target ) { } @ SuppressWarnings ( "unchecked" ) public static < T > T convert ( String value , Class < T > toType ) { } @ SuppressWarnings ( "unchecked" ) public static < T > T convert ( Object value , Class < T > toType ) { } public static Map < String , Class < ? > > classMap ( Iterable < Class < ? > > classes ) { } public static Class < ? > [ ] typesOf ( Object [ ] args ) { } public static Method findMethodByArgs ( Class < ? extends Object > clazz , String name , Object ... args ) { } @ SuppressWarnings ( "unchecked" ) public static < T > Class < T > clazz ( Type type ) { } public static Class < ? > of ( Object obj ) { } public static Object str ( Object value ) { } public static ParameterizedType generic ( Type type ) { } public static boolean isJREClass ( String canonicalClassName ) { } @ SuppressWarnings ( "unchecked" ) public static < T > Class < T > getWrapperClass ( Class < T > c ) { } public static boolean instanceOf ( Object obj , Class < ? > ... classes ) { }

Fix:
return ( ( T ) ( Proxy . newProxyInstance ( interfaces [ 0 ] . getClassLoader ( ) , interfaces , handler ) ) ) ;